Weatherproof composition.



H UGO GALLINOWSKY, OFCINCINNjATI, OHIO.

wnn'rnnarnoor comrosxrion.

No Drawing.

To all whom it may concern: 4

Be it known that I, IIUGOGALLINOWSKY, a resident of Cincinnati, in theState of Ohio, have invented a new and useful Improvement in\Veatherproof Composition, of which the-following is a specification.

v This invention relates to plastic compositions, and more especially tosuch compositions for producing artificial stone, such as marble andother stone'of the fitter quality which is usually used for interiorwork and ;given a high finish or polish.

The object of this invention is to provide a plastic composition, whichcan be molded or laid down in any size or applied as a coating, andwhich w en set, very closely resembles polished marble and which isweather proof and enduring.

It is well known that if magnesite is cal 'cined and reduced to powderedform, result ing in magnesium o-xid, and treated with ma esium chloridit forms a cement of very satisfactory uality. Artificial stone formed.from such composition is very satisfactory when new, but it does nothave the necessary enduring or lasting quality, and furthermore, issomewhat objectionable as the sura face thereof is constantly damp. Ihave discovered that'this is due to the fact that 80 the ingredients areunited only partially, leaving a certain amount of free magnesium oxidand free magnesium chlorid in the cement product, and that both of theseact detrimentally in time. The magnesium oxid carbonizes and expands, soinjuring the bond of the composition and causing itto disintegrate whilethe chlorid in time appears on the surface and keeps the. latterconstantly damp, due to its afiinity for moisture. In my improvedcomposition I overcome these faults and bring the cement up to itsmaximum usefulness and endurance by adding suitable ingredients whichconibine with the free magnesium oxid and neutralize the alkalinematter, that is, the free magnesium chlorid. As an ingredient for;

combining with the free magnesium oxid I prefer to use silica in somefine form, such. as mineral wool, and especially such as prepared bysuperheating granite and forming it into a fine silica fiber whichbecomes pliable if moistened with analkaline solution and which isprincipally silica in a "me Specification of Lettersv Patent.Application filed tune '26, 1908. Serial No. 4 4o,55o.

- har Patented Sept. "7, 1909.

fibrous form, and crushed or hammered until reduced very fine. This ismixed with the a magnesium oxid in a proportion suitable forv theintended work, after which I add a suitable neutralizer for the freealkali, preferably in the form of barium sulfate or barite,

either artificially prepared and known under the name of ermanent whiteor the well known mineral arite, The barium sulfate is added in suchproportions as to neutralize all of the free ma esium-chlorid; Thismixture is then ren ered plastic by adding ,to it magnesium chloridinsolution and at a density of about 30 degrees. In this plastic form themixture can be molded or laid on with a trowel or the like in anydesired When it en-sit very closely resembles polished marble and hasall of the enduring qualities of the latter. The fine particles ofsilica, that is, mineral wool, in time combine with any magnesium oxidwhich is left free in the first hardening of the substance, while thesulfate of barium neutralizes all particles of alkaline matter, that is,any free magnesium chlorid. The consequence is that there is'no dangerof carbonization' of the magnesium oxid, and no detrimental expansionand disintegration referred to, and furthermore the absence of any freealkaline'matter does away with the objectionable dampness on thesurface.

The several ingredients named may be mixed in various proportionsdepending upon the character of work. The following proportions havebeen found satisfactory, the ingredients being measured and not weighed:magnesium oxid 2 parts, crushed mineral wool 2 parts, sulfate of barium1 part, magnesium chlorid 3 parts. The proshaga size, or thickness'oflayer.

portion of the solution of magnesium chlorid added wlll vary accordingto the degree of plastlclty to be g1ven to the mixture and the sulfateof barium may bear a certain relation hi the magnesium chlorid, that is,if

more ofthe solution is used it vcalls for ,a

larger quantity of the sulfate of barium, and

vice versa. The proportion. of silica and barium sulfate added may beincreased considerably above those-stated as an excess of either will dono harm, since those parts not entering into cher'nicul combination will10.5 merely act as a dead filler.

This composition-may have added to it coloring matter if desired and nmyalso have added thereto other ingredients to ""1'01'11! artificialsto'neof dii'lerent colors and 45 appearances.

What I claim is: I The herein described Weather-proof c'o'mrholsitionifor artificial stone and the like, 1; consisting of magnesium oxicl,magnesium in chl(' )rid,' pulverized silica in sufficient quan-';tit-'y" to combine with all free magnesium oxidyand' a substance toneutralize all free miignesi um chlorid.

"l-he herein described weather-proof ls'r'om position for artificialstone and the like, '-onsisting of; magnesiumoxid magnesiumcli'lorich'mii'teriel which combines with the freemagnesium-oxid, andsulfate of barium j insufficient quantity to neutralize all free 20magnesium chlorid;

' 3. The herein "described weather proof composition for. artificialstone and the like, cons sting ofmagnesium oxid, magnesium" chlorid,powdered silica in sufiicient quantity zo'zto'comblne With'allfreemagnesium oxid,

and sulfate of barium insuiiieientj quantity to neutralize all freemagnesium chlorid.

4. The herein described weather -,proof composition for artificial stoneand the like, consisting of 'n'iuguesium oxid, magnesium ehlorid,powdered silica, and barium sulfate, the barium sulfate being inexcess-0f four per cent. of the mixture. I

.3. A basic oxyehlorid cement including magnesium oxid, magnesiumchlorid, and ingredients Which'combine and neutralize the freeingredients of the cement and which are inert us to the excess portionsthereof.

(i. [L basic o ;ychlorid cement including magnesium oxid and ma nesiumchlorid, 40 and crushed mineral woo and sulfate of barium to bind themagnesium chlorid and neutralize the remaining free portions of saidingredients.

In testimony whereof, I have hereunto set 45 my hand. 7

- I HUGO GALLINOWSKY.

' WVitnesses:

G, BIANCBT, J.- A. Gum'rnousn.

